Would self-interaction mean something like:
just like the massless photon, the massless graviton would be bent by the gravity of black holes... hence self interaction?
just like the massless photon, the massless graviton would be bent by the gravity of black holes... hence self interaction?
In QED, photon and photon do interacts too and you can calculate its effect to be small. In GR, you can expect self interaction is small if the space time curvature is small.
(Photon is the particle that mediates QED, and graviton is the hypothetical particle that mediates gravity.)